Well its going to depend on the hog and their own habits, this is mine with my Vera Lee.
Daily - Spot Checking and cleaning any messes in the cage, she's insanely good about using her litter box for both pooping and peeing so there's never anything to clean up, except loose aspen bedding (its what she uses for litter) and she LOVES to dig all her food out, so its always on the bottom of the cage floor.
Weekly - I change the liner once a week, again due to the fact she never goes to the bathroom on it. I know if they do go on the liner its usually recommended to change out the liner every 2 to 3 days. I also wipe down the plastic tray in her cage with a 50-50 water vinegar mix just to make sure its clean. Her litter pan which is a good size also gets cleaned once a week, unless it gets really messy. Again cleaned with the 50-50 mix.
Bi-Weekly - She gets a bath every two weeks, unless she gets extra stinky.
There's really nothing I do Monthly unless you count me changing the air filter in her air purifier thats near her cage. Everything else is either weekly or bi-weekly.